DVI interface can only transmit image signals support for digital audio signal no consideration. Because of these shortcoming
The introduction of HDMI technology, not the whim of these manufacturers impulsive behavior contrary, there are behind the more deep-seated reasons.
April 1999, in order to meet the requirements of high-quality graphic image of the digital age, DDWG (Digital Display Working Group) Digital Display Working Group is modeled on Silicon Image's patented technology, launched a project called DVI (Digital Visual Interface) interface, aimed at harmonizing the new era of digital display interface standard. This technology and has been widely supported by the IT industry to Intel, Dell, HP, IBM, Microsoft and other large enterprises. After more than three years of promotion, DVI technology in computer output fields quickly use, but along with the development of digital high-definition audio and video technology, DVI interface also began to expose the problems, and even to some extent as the progress of digital imaging technology bottleneck.
DVI interface of the main problems are:
* DVI interface object of consideration is a PC, compatibility of flat-panel TVs.
* DVI interface on the lack of support for image copyright protection.
* DVI interface supports only the RGB digital signals of the computer field can not be supported, while on the digitized color difference signal.
* DVI interface only support 8bit RGB signal transmission, can not let the wide gamut display terminal for optimum performance.
* DVI interface for compatibility reasons, set aside a lot of pins to support analog devices, resulting in interface bulky, inefficient.
* DVI interface can only transmit image signals support for digital audio signal no consideration.
Because of these shortcomings, DVI interface has been unable to better meet the Main product: HDMI Cable is with good quality. development needs of the industry as a whole. Therefore, both IT vendors, flat-panel TV manufacturers, many of Hollywood's publisher, urgently needs a better able to meet the future development of the industry of high-definition video interface technology, is for these reasons that prompted the HDMI standard was born.
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